Milbank U6227-X-400-K3L-BL 4-J...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$13,647.43
Milbank U6227-X-400-K3L-BL 4-Jaw Ringless Meter Socket, 1-Phase, 320-Amp

Milbank U6227-X-400-K3L-BL 4-Jaw Ringless Meter Socket, 1-Phase, 320-Amp

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Model: U6227-X-400-K3L-BL

In Stock (leaves warehouse same day if ordered before 3pm ET)

$13,647.43
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Milbank U6227-X-400-K3L-BL 4-Jaw Ringless Meter Socket, 1-Phase, 320-Amp

The Milbank U6227-X-400-K3L-BL is a 1-Phase ringless meter socket engineered with a 4-Jaw configuration and a 320-Amp rating for reliable electric utility metering. Designed for use at residential and commercial service entrances, this ringless meter socket allows the utility meter to be mounted directly to the enclosure without a separate sealing ring, simplifying installation and meter access. This Milbank meter socket is intended for point-of-service installation where accurate, tamper-resistant metering is required by the utility. The 4-Jaw design and 320-Amp capacity make this Milbank meter socket well suited for single-phase service applications that demand dependable, code-compliant metering equipment.

Key Features

  • 1-Phase Configuration: Designed specifically for single-phase electrical service, matching common residential and light commercial metering requirements.
  • Ringless Design: The meter mounts directly to the socket without a separate ring, streamlining installation and simplifying utility meter reading and replacement.
  • 4-Jaw Meter Configuration: Features a 4-jaw meter socket arrangement to accommodate standard 4-jaw utility meters for accurate, secure metering connections.
  • 320-Amp Rating: Rated for 320-Amp service, providing the capacity needed for demanding single-phase electrical loads.
  • Utility-Grade Metering Equipment: Built as dedicated metering equipment for electric utility service, supporting accurate consumption measurement at the point of service entrance.
  • Model U6227-X-400-K3L-BL: Identified by Milbank model number U6227-X-400-K3L-BL for accurate ordering and cross-reference.

Technical Specifications

  • Refer to manufacturer documentation for complete technical specifications.

Typical Applications

  • Residential Electric Service Entrances
  • Commercial Single-Phase Metering Installations
  • Utility Meter Upgrades and Retrofits
  • New Construction Electrical Service Setups
  • Ringless Metering Equipment Replacements
  • Electric Utility Metering Points

Why Milbank?

Milbank is a recognized manufacturer of electric utility metering equipment, and the U6227-X-400-K3L-BL continues that standard with a 1-Phase, 4-Jaw, ringless meter socket built for 320-Amp service. Its ringless configuration and 4-jaw meter compatibility support straightforward installation and dependable, code-compliant metering performance for electrical professionals and utilities alike. Choosing a purpose-built Milbank meter socket helps ensure proper fit with 4-jaw utility meters and supports long-term, trouble-free service at the metering point.

Manufacturer Resources

Product Specs

list_batch:
MIL-20260917
Product Type:
Ringless Meter Socket
Amperage Rating:
320A
Configuration:
1-Phase 4-Jaw Ringless
Department:
Electrical
Product Subgroup:
Metering & Meter Sockets
Product Group:
Power Distribution

Milbank U6227-X-400-K3L-BL – Frequently Asked Questions

1) What does ringless mean on this Milbank meter socket, and will my utility accept it?
Ringless means the meter mounts to the enclosure without a separate sealing ring; the cover itself secures the meter. Utilities specify either ringless or ring-type and they are not interchangeable, so confirm with the serving utility which style they approve before ordering the U6227-X-400-K3L-BL.
2) Is a 320-amp meter socket the right choice for a 400-amp residential service?
A 320A continuous rating is the standard designation used for what is commonly called 400-amp class single-phase residential service - the socket is rated 320A continuous / 400A intermittent. The Milbank U6227-X-400-K3L-BL carries that 320A rating and is intended for single-phase service entrances. For a 200A service, use a 200A socket instead; oversizing the socket does not buy you anything and the utility will want the rating to match the service.
3) Can I use this Milbank socket on a three-phase service?
No. The U6227-X-400-K3L-BL is a single-phase, 4-jaw socket. Three-phase metering needs a 7-jaw (or utility-specified) three-phase socket. Putting a 1-phase 4-jaw can on a three-phase service will not meter correctly and the utility will reject the installation.
4) My utility requires a 5-jaw 5T meter socket. Can I use the Milbank U6227-X-400-K3L-BL?
No. The U6227-X-400-K3L-BL is a 4-jaw socket, so it accepts standard 4-jaw utility meters only. For a 5T single-phase meter, the ABB TMPR MeterMod III is a ringless single-phase socket built for the 5T meter form. Jaw count is set by the utility's meter, so match the socket to the meter they will install.
5) What is the difference between the Milbank U6227-X-400-K3L-BL meter socket and the ABB TMPR MeterMod III?
Both are ringless single-phase meter sockets, so in each case the utility meter mounts directly to the enclosure without a separate sealing ring. The Milbank U6227-X-400-K3L-BL is a 4-jaw socket rated 320A, which is the configuration used for 320A/400A class single-phase residential and light commercial service entrances. The ABB TMPR is part of the MeterMod III series and is a 5T single-phase socket, meaning it takes a 5-jaw 5T meter rather than a 4-jaw meter. Confirm with the serving utility which meter form it will set before ordering, since a 4-jaw meter will not seat in a 5T socket.
6) What else do I need besides the meter socket to finish a 320-amp service entrance?
The socket itself is metering equipment only - it does not include the meter (the utility sets that) and it does not provide overcurrent protection. You still need service entrance conductors sized for the 320A/400A-class service, the service disconnect or main breaker panel downstream, grounding and bonding, hubs or fittings for the service raceway, and a utility seal. Many 320A residential installs land on a meter-main combination instead; if you want the disconnect integral to the can, specify a meter-main rather than this straight socket.
7) Is this Milbank socket suitable for a meter swap on an existing ringless installation?
It is sold for utility meter upgrades, retrofits and ringless metering replacements, so it is a reasonable swap where the existing can is ringless, single-phase, 4-jaw. What decides it is the service size: this one is 320A, so replacing a 200A can with it also means the conductors, raceway and downstream equipment have to suit the larger service.
8) What other ringless meter sockets are there if the Milbank U6227 is not what my utility approved?
ZenSupply also carries the ABB TMPR MeterMod III ringless meter socket, a 5T single-phase unit. The difference that matters is the jaw arrangement: the Milbank U6227-X-400-K3L-BL is 4-jaw, while the ABB TMPR is a 5-jaw (5T) socket. Pick by what the serving utility's meter requires, not by brand.
9) Is the ABB TMPR a drop-in replacement for a Milbank U6227-X-400-K3L-BL?
Not a straight swap. Both are ringless single-phase sockets, but the Milbank U6227-X-400-K3L-BL is a 4-jaw unit rated 320A while the ABB TMPR MeterMod III is built for a 5T meter. Swapping between them changes the meter form the socket will accept, so the existing meter and the utility's requirement decide which one fits the opening. If the service is an existing 320A 4-jaw ringless installation, stay with the U6227-X-400-K3L-BL.
10) What is the exact part number to order this Milbank 320-amp ringless socket?
Order it as Milbank U6227-X-400-K3L-BL. That single model covers the 1-phase, 4-jaw, ringless, 320A configuration - there are no finish or size options to pick on it, so the model number alone defines the part.
How fast can I get the Milbank U6227-X-400-K3L-BL delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Milbank U6227-X-400-K3L-BL come with a warranty?
Absolutely. The Milbank U6227-X-400-K3L-BL is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Milbank U6227-X-400-K3L-BL?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
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